Fix memory leak on Chromium OS Heapcheck and Chromium OS (valgrind)

ash/desktop_background/desktop_background_widget_controller.cc

Index: ash/desktop_background/desktop_background_widget_controller.cc
diff --git a/ash/desktop_background/desktop_background_widget_controller.cc b/ash/desktop_background/desktop_background_widget_controller.cc
index 1d0f5fa9066c1ff5100c17e0e5018a565b32e584..5d2bf71038f005176a0b13cb4f07ff806eb6658b 100644
--- a/ash/desktop_background/desktop_background_widget_controller.cc
+++ b/ash/desktop_background/desktop_background_widget_controller.cc
@@ -55,7 +55,15 @@ void DesktopBackgroundWidgetController::Reparent(aura::RootWindow* root_window,
 }
 
 ComponentWrapper::ComponentWrapper(
-    DesktopBackgroundWidgetController* component) : component_(component) {
+    DesktopBackgroundWidgetController* component) {
+  component_.reset(component);
+}
+
+DesktopBackgroundWidgetController* ComponentWrapper::GetComponent(
+    bool pass_ownership) {
+  if (pass_ownership)
+    return component_.release();
+  return component_.get();
 }
 
 }  // namespace internal